Study: Juul Pods Contain Caffeine. What's It Doing There, And What Does It Do? Harvard researchers discover toxin in Juul pods that can cause longterm lung damage New ban on JUUL e cigarettes worries some St. Louis business owners FOX 2 FDA Says Juul Products Must Come Off Store Shelves Juul Pods 4 Pack Brick $16.88 Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times